Efficient and Rapid Removal of Environmental Malignant Arsenic(III) and Industrial Dyes Using Reusable, Recoverable Ternary Iron Oxide - ORMOSIL - Reduced Graphene Oxide Composite

Abstract

In this work, we have demonstrated an efficient and simple reusable catalyst, which can be operated on site for water remediation. In the present report, we have proposed a near 100% dye adsorption and the effective removal of arsenic­(III) using a ternary composite consisting of ORMOSIL-Fe3O4-RGO. A simple and low-temperature synthesis to prepare an ORMOSIL-Fe3O4-RGO composite has been developed as a one stop solution for water remediation. Particularly, this composite was employed for the elimination of arsenite (III) ions and Rhodamine B dye from water, which has a huge impact in developing/underdeveloped countries in South Asian and some of the American regions. The structural, physical, and chemical properties of this composite were investigated through various characterization techniques like powder X-ray diffraction (PXRD), fourier transform infrared spectroscopy (FT-IR), field emission scanning electron microscopy (FESEM), energy dispersion X-ray (EDS), transmission electron microscopy (TEM), and vibrating sample magnetometer (VSM). Using Langmuir isotherms, we calculated the adsorption capacity of the ORMOSIL-Fe3O4-RGO composite for Rhodamine B to be ∼1339 mg/g, which is much higher as compared to that of the Fe3O4-RGO composite (∼342 mg/g). Furthermore, the capacity of arsenic adsorption of this novel composite material is ∼25% higher than that of Fe3O4-RGO according to the Langmuir adsorption isotherm.

Magnetically recoverable magnetite-reduced graphene oxide as a demulsifier for surfactant stabilized crude oil-in-water emulsion

“…According to Zhou et al [34], no characteristic diffraction peak for rGO was detected in the XRD pattern because of the low amount and relatively low diffraction intensity of rGO. This hypothesis was supported by Sahu et al [35], who declared that no significant peak was observed for rGO because of the weak crystallinity of carbon-based materials as compared with metal oxides (magnetite).The presence of magnetite nanoparticles and the disappearance of the GO characteristic peak indicated the successful synthesis of magnetite nanoparticles with rGO sheets through an in situ chemical synthesis. The average crystallite size of the magnetite nanoparticles formed on the surface of the rGO sheets can be calculated using the Debye Scherrer equation.…”

“…All of these happens was due to the removal of the oxygen-containing functional groups from the GO surface during in situ chemical synthesis to form rGO sheets for the attachment of magnetite nanoparticles. According to Sahu et al [35], the presence of the C = C and C-O characteristic peaks at 1573 and 1208 cm -1 , respectively, confirmed the formation of rGO in the M-rGO nanocomposites. The red shifted of the transmittance peak C-O at 1208 cm -1 occurred because of the Fe-O-C vibration, which confirmed the interaction between magnetite and rGO sheets [35].…”

“…According to Sahu et al [35], the presence of the C = C and C-O characteristic peaks at 1573 and 1208 cm -1 , respectively, confirmed the formation of rGO in the M-rGO nanocomposites. The red shifted of the transmittance peak C-O at 1208 cm -1 occurred because of the Fe-O-C vibration, which confirmed the interaction between magnetite and rGO sheets [35]. The presence of a Fe-O lattice vibration at 625 and 566 cm -1 in the FTIR spectra of M-…”

Development of ternary nanoadsorbent composites of graphene oxide, activated carbon, and zero‐valent iron nanoparticles for food applications

“…Furthermore, the element mapping of C, Fe, and O is shown in Figure analyzed by energy‐dispersive X‐ray spectroscopy in which all the elements are distributed in a homogenous pattern. In a similar work Sahu, Arora, Banik, Iyer, and Qureshi () performed an elemental mapping test to detect the distribution pattern of Fe, O, C, and silicon in the GO composites.…”

Environmentally benign fabrication of SnO2-CNT nanohybrids and their multifunctional efficiency as an adsorbent, catalyst and antimicrobial agent for water decontamination

“…However, millions of peoples worldwide drink water with a higher arsenic concentration, thereby suffering from long term health issues like cancers of the skin, liver, lung, and bladder, cardiovascular diseases, neurotoxicity and etc . 16 . As (III) is the dominant species in ground water and because of its nonionic existence (H 3 AsO 3 ), it has little affinity towards the most of the adsorbents.…”